Which descriptions apply to the market for medicinal herbs in the United States? (Select all that apply.)

The medicinal herb market in the United States has been characterized by a steadily growing number of users over recent decades, with surveys consistently showing tens of millions of Americans incorporating herbal products into their health routines. Additionally, most users do not replace conventional medical treatment with herbal remedies; instead they use herbal products alongside traditional therapies, a pattern known as complementary use. These two characteristics — expanding user base and concurrent use with conventional medicine — are well-documented features of the herbal market. The remaining options are inaccurate. Annual sales of herbal and botanical supplements in the United States have consistently exceeded several billion dollars, making the "less than $1 million" option clearly incorrect. Use has been reported in well over 10% of the adult population in multiple national surveys, so that option is also wrong. Rather than growing skepticism, consumer interest has remained strong, though calls for more rigorous research are ongoing. Finally, herbal products in the United States are regulated as dietary supplements under the Dietary Supplement Health and Education Act of 1994 (DSHEA), which places relatively light regulatory requirements on manufacturers compared to prescription drugs — they are not heavily regulated by federal law in the same way pharmaceuticals are, making that option incorrect as well.